Steam-boiler



(No Model.) 2 Sheets-Sheet 1 W; BQLE VAN.

STEAM BOILBR. lNo. 367,818.. Pategted Aug. 9, 1887.

IQQI

WITNESSES: I INVENT v.2. Sheets-Sheet 2.

llaltented Aug. 9, 1887.

. LE VAN.

(No Model.)

STEAM' BOILER.

WITNESSES.

M bu Mn..

N, PETEH Pholwlilhegmpher. washington. D.c.

UNITED STATES PATENT OFFICE.

j w. BARNET LEvAN, or PHILADELPHIA, PENNSYLVANIA,

y,STEAM son LER.v

SPECI'PIATIQN routing part of Letters Patent No'fsevis, eaten August 9, las?.

Application tiled September 17, 18,86. Serial No. 213,772.- (Noimodel.)

To all whom it mag/concern:

the city and county of Philadelphia, in the State of Pennsylvania,have invented certain new and useful Improvements in Steam-Boih ers, of which improvements the following is a specification. v

My invention more particularly relates to stationary boilers of the vhorizontal tubular type; and its object is to afford, `in connection with structural strength and simplicity, effective and desirable means for the generation of high-pressure steam, which in operation shall present the advantagesfof freedom from foaming, quick steaming capacity and production of dry steam, ample releasing'surface and steam room, thorough utilization of heat and combustion of the gases evolved from the fuel, and facility of removal -of scale or deposits of solid matter.

To this endmy improvements consist in certain novel devices and combinations, hereinafter fully set forth.

In the accompanying drawings, `Figurel is a side view in elevation of a steam-boiler, and longitudinal central section through the setting thereof, illustrating the application of my in-l vention; Fig. 2, a `view half in front elevation and'halfin vertical transverse section through the setting atthe line x @of Fig. 1; Fig. 3, a view halt' in rear elevation and half in vertical transverse section through the setting at the line y y of Fig. 1; Fig. 4,-a longitudinal central section through the front portion of the boiler and steam-drum and their connecting-neck, and Fig. 5 an end view of one of thesupporting-brackets.

' In the practice of my invention I provide a steam-boiler having a cylindrical shell composed of a series of rings or plates, 1 2 3, which are riveted one to another in telescopic form, successively and continuously increasing in diameter from the fro@ head, 4, to the back head, 5. A series of fireltubes, 6, extend from the front to the back head, said tubes being eX- panded into and beaded over the'heads in the usual manner, and being preferably so arranged. as to leave a clear vertical space of about three inches at the center ot' the boiler and a minimum equal space between the outer tubes and the shell to allow a free circulation l of water. Acylindrical steam-drum, 7 which Beit known that LW. BARNF/r LE VAN, of:

may, if desired, be provided with a series of tubes, 8, for the passage of the gases escaping to the stack, is connected adjacent to its front end by a single neck, 9, to the front ring, 1, of the boilerlshell, its rear end being supported at a greater distance above the boiler by a bracket, 10, so that the drum shall, when the boiler is in operative position, be horizontal, or substantially so, while the shell of the boiler rakes or inclines downwardly toward its rear and larger end. The drum being connected to the shell at one end only, free expansion is permitted, and tendency to strain and leakage in expansion and contraction prevented. Y The openings in the shells of the drum and boiler are each flanged outwardly and riveted to the neck 9, as shown in Fig. 4, thereby reducing the weakening of the shells due to the re- Inoval of metal, and a pipe, 11, near the rear end of the drum serves for the attachment of the steam-supply pipe leading to the engine, the SafetyLvalve chest, and the pipe leading to the water or gage column and steam-gage.

The boiler is supported in and inclosed by a brick setting, in which it is fixed so that, as before stated, it shall rake or lincline downwardly toward its rear end. The exact vdegree of inclination of the boiler is ynot material and may be varied in the discretion of the constructor, an instance which has given satisfactory results in practice being a fall of six'inches in sixteen feet. The setting is composed of side walls, 12, a rear wall, 13, and front wall, 14, provided with asuitable fire-front, 15, and i11- closes a furnace and preliminary combustionchamber, 16, and a supplemental combustion chamber, 17, each of which extendsupwardly on the sides of the boiler to or about thel'evel of the normal water=line thereof, the sides ot' the chamber 16 being outwardlyinclined from their lower to their upper portions, so as to afford access for and direct the heat of the fire to the entire surface of the boiler below the water-line. The products of .combustion pass from the chamber 17 through a back-connection ehamber,18, into the rear ends of the IOO the steam, and through the tubes of the drum, when the same are employed, into a flue, 21, provided with a suitable damper, 22, and leading to the stack 23. rlhe boiler is supported on the side walls by lugs or brackets fixed to its sides, which, for greater convenience in handling and shipment, are composed of a shell-section, 24, fixed to the boiler-shell by rivets, and a removable foot or bearing section, 25, which is bolted to the shell-section 21,:30 as to be readil y detached therefrom when required. The fire-front 15 is provided with a suitable fire-door, 26, having a register governing the admission of air above the grate, and with a door, 27, by which access is afforded to the ash-pit 2S. A sight-hole, 3l, covered by a plate of mica, is formed at the outer end of a passage in the front wall and fire-front, and enables the condition of the fire to be observed in operation without the necessity of opening thefuruace-door. A feed and blow-offpipe, 29, governed by proper valves, is led into the bottom of the boiler at or near its rear end.

The furnace and preliminary combustionchamber 16 and supplemental combustion chamber 17 are separated by afrebridge, 30, the top of which is placed at a suitable distance below the boiler to admit of the free passage of the escaping gases, and an upwardlyinclined hearth, 32, extends from a point near the rear end of the grate 33 to the fire-bridge, the space above the hearth being a prolongation of the furnace proper and providing ample room for combustion, and the inclined hearth serving to reflect the heat toward the shell of the boiler. The supplemental combustion chamber 17 is closed at its rear end by atrans- Verse division wall or septum, 84, extending from its bottom to its top, and having a series of perforations or passages, 35, for the escape of the gases of combustion in that portion of its surface below thc shell of the boiler, the gases being downwardly deflected by the closed upper portion of the wall, and having no avenue to the stack except through its lower perforations.

In operation the heat of the fire is applied to the entire exterior of the wet surface of the boiler by the upward extension of the chambers 16 and 17 to or about the waterlevel, and the division wall or septum 34, which deflects the gases to the lower portion of the chamber 17, becoming highly heated, correspondingly promotes combustion. The gases evolved from the fuel are effectuall y mingled with a propersupply of oxygen and consumed before entering the tubes, and the heat of the waste gases is desirably utilized in super-heating the steam in the drum. rlhc telescopic form and inclination of the'boiler-shell allows all scale and solid matter deposited by the feedwater to pass freely to the rear end of the boiler, at which the blow-off pipe is located, and from which the deposit may be readily removed by blowing off from time to time, as required. The inclination of the boilershell further provides a larger amount of impinging surface for the action of the heated gases, and the angular position of the front head admits of an easier release of the gases from the tubes to the exit-flue leading to the stack.

I claim as my invention and desi re to secure by Letters Patent- 1. The combination of a steam-boiler and a separate steam-drum, each having an outwardly-flanged opcningin its shell and an outwardly-flanged connecting-neck riveted at its ends to thc flanges of said openings, substantially as set forth.

2. The combination of a tubular steamboiler, a setting inclosing a furnace and combustion -chambcr below the boiler, said furnace and combustion-chamber each extending npwardly to or about the line of normal waterlevel, a transverse bridge-wall interposed between the furnace and combustion-chamber below the boiler-shell, and a transverse perforated divsion wall or septum closing the opposite end ofthe combustion-chamber, substantiall y as set forth.

\V. BAR/YET LE VAN.

Vtnesses:

JAMES MCCANN, Gno. W. Gnovns. 

